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Features
- 8 Single-Ended, 4 Differential 12-Bit Analog Inputs
- ±10 Volt Analog Input Range
- PGA with Gains of 1, 2, 4, 5, 8, 10, 16, or 20 V/V
- Up to 8 kSamples/Sec (Burst) or 1.2 kSamples/Second (Stream)
- Supports Software or Hardware Timed Acquisition
- 2 Analog Outputs
- 20 Digital I/O (Up to 50 Hz per I/O)
- 32-Bit Counter
- Watchdog Timer Function
- USB 2.0/1.1 Low Speed Interface (Data Rate Information)
- Connect Up to 80 LabJacks to One USB Host
- Complete Software Control, No Jumpers or Switches
- No Power Supply Needed
- Includes Licensed Copy of DAQFactory Express Software (Win2000 or newer)
- Includes Sample Applications and Drivers
- Includes LabVIEW VIs
- Works with Windows 98SE, ME, 2000, XP, or Vista
- Includes Cable and Screwdriver
- Money Back Guarantee
- Approximately 4" x 6" x 1"
- Rated for Industrial Temperature Range
- OEM Board-Only Versions Available
- Complete specifications in Appendix A of User's Guide
Analog Inputs
The LabJack U12 has 8 screw terminals for analog
input signals (AI0-AI7). These can be configured individually
as 8 single-ended channels, 4 differential channels, or combinations
in between. Each input has a ±10 volt input range,
12-bit resolution, and an input bias current of ±90
microamps. Differential channels can make use of the low noise
precision PGA to provide gains up to 20.
The
LabJack U12 is capable of both software and hardware timed
acquisition. When using software timed acquisition (also called
command/response), the PC sends a command to the LabJack,
and it responds with data. This mode can acquire 4 channels
at up to 50 samples/second per channel, or 8 channels at up
to 25 samples/second per channel. When using hardware timed
acquisition, the PC sends a command to the LabJack telling
it to start a burst or stream mode acquisition. Both burst
and stream mode take advantage of the LabJack's precision
timing crystal and high-speed sample buffer. In burst mode,
up to 4,096 samples will be acquired from 1-4 channels at
up to 8,192 samples/second and stored in the buffer. After
the acquisition is complete, the data is transferred to the
PC. A hardware trigger can be configured for burst mode that
starts the acquisition when a digital input changes state.
In stream mode, data is acquired from 1-4 channels at up to
1,200 samples/second and stored in the LabJack buffer. Simultaneously,
the data is transferred from the LabJack buffer to the PC
buffer, allowing the data to be streamed to disk continuously.
Click here for more info on data rates.
Analog Outputs
The
LabJack U12 has 2 screw terminals for analog
output signals (AO0 & AO1). Each analog output can
be set to a voltage between 0 and the supply voltage (+5 volts
nominal) with 10-bits of resolution. The analog outputs are
controlled in command/response mode at up to 50
Hz per channel.
Digital I/O
The
LabJack U12 has 20 digital
I/O channels which can be individually configured as input
or output.
Connections
to 4 of the digital I/O are made with the built-in screw terminals
(IO0-IO3). These 4 channels have built-in overvoltage/short-circuit
protection. As inputs or outputs, they are controlled/read
in command/response mode at up to 50 Hz per bit. As inputs
only, they can be read with the high-speed burst and stream
modes.
The
remaining 16 digital I/O are accessed through the DB-25 connector
and controlled/read in command/response mode at up to 50
Hz per bit. These channels can sink or source up to 25
mA each (total sink or source current of 200 mA max for all
16), allowing direct interface to many relays.
Counter
There is one 32-bit counter
available on the LabJack U12 (screw terminal CNT), capable
of counting frequencies up to 1 MHz. The counter is read in
command/response mode at up
to 50 Hz or up to 300 Hz in hardware timed stream mode.
Watchdog Timer Function for Unattended Operation
The
LabJack U12 also has a watchdog timer function available which
can change the states of digital I/O if the LabJack does not
successfully communicate with the PC within a specified timeout
period. This function could be used to reboot the PC allowing
for reliable unattended operation.
Portable Data Acquisition and Control
When
used with a notebook PC, the LabJack U12 becomes a convenient
portable data acquisition and control system. The watchdog
timer function allows the development of a system which has
the reliability of a datalogger with the power of a PC. The
low-power design of the LabJack U12 allows it to draw all
it's power from the USB port. Also, no UPS is needed when
using a LabJack U12 with a notebook PC. In the event of power
loss, both the LabJack and the notebook will continue to operate.
High Channel Count Applications
By
using USB hubs, up to 80 LabJacks can be connected to a single
USB host, providing an inexpensive solution for low-speed
high channel count applications.
Free Example Application Software
Includes
various example applications,
including LJlogger and LJscope. LJlogger provides datalogger
type functionality. It reads all inputs, controls all outputs,
writes real time data to disk, and sends email when events
are triggered. LJscope is a simple virtual oscilloscope program.
This software is free and can be downloaded from labjack.com
for evaluation.
Free Driver Software
Drivers
are provided as a DLL which can be called from most programming
languages. Also included are an ActiveX wrapper and LabVIEW
VIs which call all the functions in the DLL. Most driver functions
have a demo input, so applications can be developed and tested
without hardware.
Includes Everything for Out-of-the-Box Operation
Everything needed (software,
screwdriver, and USB cable) is included with the LabJack U12.
Installation is very simple and takes just a few minutes:
- Connect to the USB port on a PC running Windows 98SE/ME/2000/XP/Vista
using the included cable. The low-level drivers, which come
with Windows, will be installed automatically.
- Run the LabJack installation program to install the high-level
drivers and example applications.
OEM Versions
There are 2 OEM board-only versions of the U12 available for customers
interested in designing the U12 into another product.
LabJack U12-PH (OEM Version) -- As low as $59.50 (Quantity 100+)
-- This -PH board has pin-headers installed (component side)
instead of screw-terminals, and the LED is mounted on the
component side.
LabJack U12-NTH (OEM Version) -- As low as $56 (Quantity 100+)
-- This -NTH board does not have any through-hole components
installed (screw-terminals, pin-headers, LED, USB connector,
and DB25 connector).
The OEM versions do not include anything besides the board itself.
Dimensional drawings and software are available on the U12
downloads page.
Optional Accessories
The LabJack U12 comes complete, but we do offer a few optional
accessories. The CB25
provides screw-terminal connections and short-circuit/overvoltage
protection for the 16 I/O which are accessed through the DB25
connector. The RB16
provides sockets for industry standard miniature I/O modules
(solid state relays). The EI-1022
is an inexpensive and easy to use temperature probe. The EI-1040
is a single-supply dual instrumentation amp that provides
high impedance and high gain.
Satisfaction Guaranteed
Everything we sell has a 30-day money back guarantee. If, for any reason,
you are not satisfied with a product, contact us to arrange
your choice of a refund or replacement. In addition, the LabJack
U12 is covered by a 1-year limited warranty.
Technical Support
All LabJacks include lifetime technical support.
Support resources include forum,
FAQs, email,
and telephone.
Software & Docs
Status: In Stock
RoHS: Yes
Price: $129.00
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